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Commit 8407ef46 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'rtc-4.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux 

Pull more RTC updates from Alexandre Belloni:
 "A second pull request for v4.6 with a few fixesi before -rc1.  The new
  features for abx80x actually make the RTC behave correctly.

  Drivers:
   - abx80x: handle both XT and RC oscillators, XT failure bit and
     autocalibration
   - m41t80: avoid out of range year values
   - rv8803: workaround an i2c HW issue"

* tag 'rtc-4.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: abx80x: handle the oscillator failure bit
  rtc: abx80x: handle autocalibration
  rtc: rv8803: workaround i2c HW issue
  rtc: mcp795: add devicetree support
  rtc: asm9260: remove incorrect __init/__exit annotations
  rtc: m41t80: avoid out of range year values
  rtc: s3c: Don't print an error on probe deferral
  rtc: rv3029: stop mentioning rv3029c2
parents b4ae78ed ee087744

Documentation/devicetree/bindings/rtc/maxim,mcp795.txt

0 → 100644
+11 −0
Original line number Diff line number Diff line 
* Maxim MCP795		SPI Serial Real-Time Clock



Required properties:

- compatible: Should contain "maxim,mcp795".

- reg: SPI address for chip



Example:

	mcp795: rtc@0 {

		compatible = "maxim,mcp795";

		reg = <0>;

	};

drivers/rtc/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -589,7 +589,7 @@ config RTC_DRV_RV3029_HWMON 
	default y

	help

	  Say Y here if you want to expose temperature sensor data on

	  rtc-rv3029c2.

	  rtc-rv3029.



config RTC_DRV_RV8803

	tristate "Micro Crystal RV8803"

drivers/rtc/rtc-abx80x.c

+250 −2
Original line number Diff line number Diff line
@@ -49,7 +49,20 @@ 


#define ABX8XX_REG_CD_TIMER_CTL	0x18



#define ABX8XX_REG_OSC		0x1c

#define ABX8XX_OSC_FOS		BIT(3)

#define ABX8XX_OSC_BOS		BIT(4)

#define ABX8XX_OSC_ACAL_512	BIT(5)

#define ABX8XX_OSC_ACAL_1024	BIT(6)



#define ABX8XX_OSC_OSEL		BIT(7)



#define ABX8XX_REG_OSS		0x1d

#define ABX8XX_OSS_OF		BIT(1)

#define ABX8XX_OSS_OMODE	BIT(4)



#define ABX8XX_REG_CFG_KEY	0x1f

#define ABX8XX_CFG_KEY_OSC	0xa1

#define ABX8XX_CFG_KEY_MISC	0x9d



#define ABX8XX_REG_ID0		0x28
@@ -81,6 +94,20 @@ static struct abx80x_cap abx80x_caps[] = { 
	[ABX80X] = {.pn = 0}

};



static int abx80x_is_rc_mode(struct i2c_client *client)

{

	int flags = 0;



	flags =  i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);

	if (flags < 0) {

		dev_err(&client->dev,

			"Failed to read autocalibration attribute\n");

		return flags;

	}



	return (flags & ABX8XX_OSS_OMODE) ? 1 : 0;

}



static int abx80x_enable_trickle_charger(struct i2c_client *client,

					 u8 trickle_cfg)

{
@@ -112,7 +139,23 @@ static int abx80x_rtc_read_time(struct device *dev, struct rtc_time *tm) 
{

	struct i2c_client *client = to_i2c_client(dev);

	unsigned char buf[8];

	int err;

	int err, flags, rc_mode = 0;



	/* Read the Oscillator Failure only in XT mode */

	rc_mode = abx80x_is_rc_mode(client);

	if (rc_mode < 0)

		return rc_mode;



	if (!rc_mode) {

		flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);

		if (flags < 0)

			return flags;



		if (flags & ABX8XX_OSS_OF) {

			dev_err(dev, "Oscillator failure, data is invalid.\n");

			return -EINVAL;

		}

	}



	err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_HTH,

					    sizeof(buf), buf);
@@ -140,7 +183,7 @@ static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm) 
{

	struct i2c_client *client = to_i2c_client(dev);

	unsigned char buf[8];

	int err;

	int err, flags;



	if (tm->tm_year < 100)

		return -EINVAL;
@@ -161,6 +204,18 @@ static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm) 
		return -EIO;

	}



	/* Clear the OF bit of Oscillator Status Register */

	flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);

	if (flags < 0)

		return flags;



	err = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSS,

					flags & ~ABX8XX_OSS_OF);

	if (err < 0) {

		dev_err(&client->dev, "Unable to write oscillator status register\n");

		return err;

	}



	return 0;

}
@@ -248,6 +303,174 @@ static int abx80x_set_alarm(struct device *dev, struct rtc_wkalrm *t) 
	return 0;

}



static int abx80x_rtc_set_autocalibration(struct device *dev,

					  int autocalibration)

{

	struct i2c_client *client = to_i2c_client(dev);

	int retval, flags = 0;



	if ((autocalibration != 0) && (autocalibration != 1024) &&

	    (autocalibration != 512)) {

		dev_err(dev, "autocalibration value outside permitted range\n");

		return -EINVAL;

	}



	flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);

	if (flags < 0)

		return flags;



	if (autocalibration == 0) {

		flags &= ~(ABX8XX_OSC_ACAL_512 | ABX8XX_OSC_ACAL_1024);

	} else if (autocalibration == 1024) {

		/* 1024 autocalibration is 0x10 */

		flags |= ABX8XX_OSC_ACAL_1024;

		flags &= ~(ABX8XX_OSC_ACAL_512);

	} else {

		/* 512 autocalibration is 0x11 */

		flags |= (ABX8XX_OSC_ACAL_1024 | ABX8XX_OSC_ACAL_512);

	}



	/* Unlock write access to Oscillator Control Register */

	retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,

					   ABX8XX_CFG_KEY_OSC);

	if (retval < 0) {

		dev_err(dev, "Failed to write CONFIG_KEY register\n");

		return retval;

	}



	retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);



	return retval;

}



static int abx80x_rtc_get_autocalibration(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	int flags = 0, autocalibration;



	flags =  i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);

	if (flags < 0)

		return flags;



	if (flags & ABX8XX_OSC_ACAL_512)

		autocalibration = 512;

	else if (flags & ABX8XX_OSC_ACAL_1024)

		autocalibration = 1024;

	else

		autocalibration = 0;



	return autocalibration;

}



static ssize_t autocalibration_store(struct device *dev,

				     struct device_attribute *attr,

				     const char *buf, size_t count)

{

	int retval;

	unsigned long autocalibration = 0;



	retval = kstrtoul(buf, 10, &autocalibration);

	if (retval < 0) {

		dev_err(dev, "Failed to store RTC autocalibration attribute\n");

		return -EINVAL;

	}



	retval = abx80x_rtc_set_autocalibration(dev, autocalibration);



	return retval ? retval : count;

}



static ssize_t autocalibration_show(struct device *dev,

				    struct device_attribute *attr, char *buf)

{

	int autocalibration = 0;



	autocalibration = abx80x_rtc_get_autocalibration(dev);

	if (autocalibration < 0) {

		dev_err(dev, "Failed to read RTC autocalibration\n");

		sprintf(buf, "0\n");

		return autocalibration;

	}



	return sprintf(buf, "%d\n", autocalibration);

}



static DEVICE_ATTR_RW(autocalibration);



static ssize_t oscillator_store(struct device *dev,

				struct device_attribute *attr,

				const char *buf, size_t count)

{

	struct i2c_client *client = to_i2c_client(dev);

	int retval, flags, rc_mode = 0;



	if (strncmp(buf, "rc", 2) == 0) {

		rc_mode = 1;

	} else if (strncmp(buf, "xtal", 4) == 0) {

		rc_mode = 0;

	} else {

		dev_err(dev, "Oscillator selection value outside permitted ones\n");

		return -EINVAL;

	}



	flags =  i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);

	if (flags < 0)

		return flags;



	if (rc_mode == 0)

		flags &= ~(ABX8XX_OSC_OSEL);

	else

		flags |= (ABX8XX_OSC_OSEL);



	/* Unlock write access on Oscillator Control register */

	retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,

					   ABX8XX_CFG_KEY_OSC);

	if (retval < 0) {

		dev_err(dev, "Failed to write CONFIG_KEY register\n");

		return retval;

	}



	retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);

	if (retval < 0) {

		dev_err(dev, "Failed to write Oscillator Control register\n");

		return retval;

	}



	return retval ? retval : count;

}



static ssize_t oscillator_show(struct device *dev,

			       struct device_attribute *attr, char *buf)

{

	int rc_mode = 0;

	struct i2c_client *client = to_i2c_client(dev);



	rc_mode = abx80x_is_rc_mode(client);



	if (rc_mode < 0) {

		dev_err(dev, "Failed to read RTC oscillator selection\n");

		sprintf(buf, "\n");

		return rc_mode;

	}



	if (rc_mode)

		return sprintf(buf, "rc\n");

	else

		return sprintf(buf, "xtal\n");

}



static DEVICE_ATTR_RW(oscillator);



static struct attribute *rtc_calib_attrs[] = {

	&dev_attr_autocalibration.attr,

	&dev_attr_oscillator.attr,

	NULL,

};



static const struct attribute_group rtc_calib_attr_group = {

	.attrs		= rtc_calib_attrs,

};



static int abx80x_alarm_irq_enable(struct device *dev, unsigned int enabled)

{

	struct i2c_client *client = to_i2c_client(dev);
@@ -303,6 +526,13 @@ static int abx80x_dt_trickle_cfg(struct device_node *np) 
	return (trickle_cfg | i);

}



static void rtc_calib_remove_sysfs_group(void *_dev)

{

	struct device *dev = _dev;



	sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group);

}



static int abx80x_probe(struct i2c_client *client,

			const struct i2c_device_id *id)

{
@@ -405,6 +635,24 @@ static int abx80x_probe(struct i2c_client *client, 
		}

	}



	/* Export sysfs entries */

	err = sysfs_create_group(&(&client->dev)->kobj, &rtc_calib_attr_group);

	if (err) {

		dev_err(&client->dev, "Failed to create sysfs group: %d\n",

			err);

		return err;

	}



	err = devm_add_action(&client->dev, rtc_calib_remove_sysfs_group,

			      &client->dev);

	if (err) {

		rtc_calib_remove_sysfs_group(&client->dev);

		dev_err(&client->dev,

			"Failed to add sysfs cleanup action: %d\n",

			err);

		return err;

	}



	return 0;

}

drivers/rtc/rtc-asm9260.c

+2 −2
Original line number Diff line number Diff line
@@ -255,7 +255,7 @@ static const struct rtc_class_ops asm9260_rtc_ops = { 
	.alarm_irq_enable	= asm9260_alarm_irq_enable,

};



static int __init asm9260_rtc_probe(struct platform_device *pdev)

static int asm9260_rtc_probe(struct platform_device *pdev)

{

	struct asm9260_rtc_priv *priv;

	struct device *dev = &pdev->dev;
@@ -323,7 +323,7 @@ static int __init asm9260_rtc_probe(struct platform_device *pdev) 
	return ret;

}



static int __exit asm9260_rtc_remove(struct platform_device *pdev)

static int asm9260_rtc_remove(struct platform_device *pdev)

{

	struct asm9260_rtc_priv *priv = platform_get_drvdata(pdev);

drivers/rtc/rtc-m41t80.c

+6 −0
Original line number Diff line number Diff line
@@ -176,7 +176,13 @@ static int m41t80_set_datetime(struct i2c_client *client, struct rtc_time *tm) 
		bin2bcd(tm->tm_mday) | (buf[M41T80_REG_DAY] & ~0x3f);

	buf[M41T80_REG_MON] =

		bin2bcd(tm->tm_mon + 1) | (buf[M41T80_REG_MON] & ~0x1f);



	/* assume 20YY not 19YY */

	if (tm->tm_year < 100 || tm->tm_year > 199) {

		dev_err(&client->dev, "Year must be between 2000 and 2099. It's %d.\n",

			tm->tm_year + 1900);

		return -EINVAL;

	}

	buf[M41T80_REG_YEAR] = bin2bcd(tm->tm_year % 100);



	if (i2c_transfer(client->adapter, msgs, 1) != 1) {